Recommended Practice RP3
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National Association of S Gaugers, Inc.
Engineering Group

Recommended Practice RP3:   Track - Proto:64

Track Gauge minimum

Gmin

0.883"          22.43mm

Track Guage maximum

Gmax

0.909"          23.09mm

Check Gauge minimum

Cmin

0.851"          21.62mm

Span maximum

Smax

0.822"          20.88mm

Flangeway maximum

Fmax

0.041"          1.04mm

Flange Height minimum

Hmin

0.026"          0.66mm

Point Spread maximum

Pmax (E) Electrical

0.838"          21.28mm

Notes:

  1. For further information on Track & Wheels, see NASG Standard RP3 & RP4 Help File.
  2. Recommended Wheel Contour is Association of American Railroads.
  3. Adopted by the NASG - September 1998.

 Drawn by Randy Wilson - 27 December 1995


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